public class Usertest {
    public static void main(String[] args) {
        //User user=new User();
        //user.username="admin";
        //System.out.println(user.getUsername();
        User user3=new User(1,"admin");
        user3.setUsername("james");
        System.out.println(user3.getId());
        System.out.println(user3.getUsername());


        User user = new User();
        user.setId(100);
        user.setUsername("tom");
        user.setUsername("jack");
        System.out.println(user.getId());
        System.out.println(user.getUsername());
    }
}
